/// <summary>Extends the frame into client area.
/// </summary>
/// <param name="hwnd">The Window.</param>
/// <param name="margin">The margin.</param>
/// <returns><c>True</c> if the function succeeded, <c>False</c> otherwise.</returns>
public static void ExtendFrameIntoClientArea(IntPtr hwnd, Thickness margin)
{
if (!IsCompositionEnabled)
throw new InvalidOperationException("Composition is not enabled. Glass cannot be extended.");
if (hwnd == IntPtr.Zero)
throw new InvalidOperationException("The Window must be shown before extending glass. As a suggestion, in WPF you should call this during the SourceInitialized event.");
// Set the background to transparent to get the full Glass effect
HwndSource.FromHwnd(hwnd).CompositionTarget.BackgroundColor = Colors.Transparent;
MARGINS margins = new MARGINS(margin);
DwmExtendFrameIntoClientArea(hwnd, ref margins);
}
private static extern void DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS margins);
